Fix RPM spec file (#69)

* Add back `-t`

Author: scaryrawr

sl.spec

@@ -30,12 +30,12 @@ SL (Steam Locomotive) runs across your terminal when you type "sl" as you meant
 COMPLETION_DIR="$(pwd)/completions" cargo build --release
 
 %install
-install -Dpm 0755 target/release/sl     %{buildroot}%{_bindir}/sl
-install -Dpm 0644 completions/sl.1      %{buildroot}%{_mandir}/man1/sl.1
-install -Dpm 0644 sl.1.ja               %{buildroot}%{_mandir}/man1/sl.1.ja
-install -Dpm 0644 completions/sl.bash   %{buildroot}%{bash_completions_dir}
-install -Dpm 0644 completions/sl.fish   %{buildroot}%{fish_completions_dir}
-install -Dpm 0644 completions/_sl       %{buildroot}%{zsh_completions_dir}
+install -Dpm 0755 target/release/sl         %{buildroot}%{_bindir}/sl
+install -Dpm 0644 completions/sl.1          %{buildroot}%{_mandir}/man1/sl.1
+install -Dpm 0644 sl.1.ja                   %{buildroot}%{_mandir}/man1/sl.1.ja
+install -Dpm 0644 completions/sl.bash -t    %{buildroot}%{bash_completions_dir}
+install -Dpm 0644 completions/sl.fish -t    %{buildroot}%{fish_completions_dir}
+install -Dpm 0644 completions/_sl -t        %{buildroot}%{zsh_completions_dir}
 
 %changelog
 {{{ git_dir_changelog }}}